This always makes me ambivalent about enthusiast blog posts. Like on the one hand, cool that the knowledge gets spread. On the other hand, whenever one gets popular, another hidden gem skyrockets in price or becomes semi-permanently low in stock.

The invisible hand of the market finger-blasting our wallets again.

Haha yeah, I do realize that "hidden gems" are effectively arbitrage, where you are underpaying relative to the actual (market) value of the item.